How does coal differ from pine trees as a source of energy? a. coal can be replaced easily, while pine trees are difficult to replace. b. coal is a nonrenewable resource, while pine trees are a renewable resource. c. coal is a clean source of energy, while pine trees cause environmental damage. d. coal is an expensive source of energy, while pine trees are an inexpensive source of energy.

How does this experiment explain why it is often milder in areas such as coastal maryland while areas such as kansas or iowa have more extremes in temperature

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

Diabetes is often suspected when glucose shows up in urine tests. use the model to explain how glucose could be present in urine. why do you think this symptom is especially concerning for young people?